Skip to main content

Advertisement

Table 1 Results of the stable isotope (δ13C, δ18O) analyses of oysters and brachiopods from the Lower Jurassic of northern Chile. In addition to well-preserved shells, some luminescent and altered oyster shells as well as sediment and cement samples were analyzed. Please note that the high-resolution analysis of specimen CH18-006 indicated a diagenetic alteration of this shell, which has consequently not been used for further interpretations

From: First steps in reconstructing Early Jurassic sea water temperatures in the Andean Basin of northern Chile based on stable isotope analyses of oyster and brachiopod shells

Specimen no.TaxonomyBed no.AgeAmmonite zoneδ13C (‰ VPDB)δ18O (‰ VPDB)T (°C)a
Oysters and brachiopods
 CH18-026Actinostreon solitarium4-3Late ToarcianMiddle to upper Levesquei2.57-2.4622.3
 CH18-027Actinostreon solitarium4-3Late ToarcianMiddle to upper Levesquei1.98-2.9324.5
 CH18-013Actinostreon solitarium4-2Late ToarcianMiddle to upper Levesquei2.08-2.6022.9
 CH18-014Actinostreon solitarium4-2Late ToarcianMiddle to upper Levesquei1.84-3.1525.5
 CH18-006Gryphaea sp.6-10Late ToarcianThouarsense – lower Levesquei1.96-4.91(34.2)
 CH18-007Gryphaea sp.6-10Late ToarcianThouarsense – lower Levesquei1.91-3.5227.3
 CH18-008Gryphaea sp.6-10Late ToarcianThouarsense – lower Levesquei2.10-3.6928.1
 CH18-015Gryphaea sp.5-7Late ToarcianThouarsense – lower Levesquei2.59-2.4622.3
 CH18-016Gryphaea sp.5-7Late ToarcianThouarsense – lower Levesquei2.32-2.7623.7
 CH18-017Gryphaea sp.5-7Late ToarcianThouarsense – lower Levesquei2.42-3.1925.7
 CH18-029Gryphaea sp.4-1Late ToarcianThouarsense – lower Levesquei2.16-2.8123.9
 CH18-030Gryphaea sp.4-1Late ToarcianThouarsense – lower Levesquei1.76-2.7923.8
 CH18-046Rhynchonelloidea sp.4-1Late ToarcianThouarsense – lower Levesquei-0.05-3.0124.8
 CH18-048Actinostreon solitarium4-1Late ToarcianThouarsense – lower Levesquei2.36-2.5622.8
 CH18-002Rudirhynchia aff. rudis6-9Late PliensbachianSpinatum1.63-1.8519.6
 CH18-001Rudirhynchia aff. rudis6-8Late PliensbachianSpinatum1.60-3.0725.1
 CH18-032Tetrarhynchia tetraheda2-2Late PliensbachianMargaritatus2.01-4.8834.0
 CH18-034Quadratirhynchia lenticulata2-1Early–Late PliensbachianUpper Davoei – lower Margaritatus1.48-3.8628.9
 CH18-003Spiriferina chilensis5-4Late SinemurianRaricostatum0.72-2.3621.9
 CH18-056Gibbirhynchia curviceps6-6Late SinemurianRaricostatum1.51-2.3121.6
 CH18-057Gibbirhynchia curviceps6-6Late SinemurianRaricostatum1.25-3.2225.9
 CH18-059Gibbirhynchia curviceps6-6Late SinemurianRaricostatum1.71-3.4526.9
 CH18-037Gibbirhynchia curviceps5-3Late SinemurianRaricostatum1.97-2.7023.4
 CH18-038Gibbirhynchia curviceps5-3Late SinemurianRaricostatum1.21-3.1425.4
 CH18-040Gibbirhynchia curviceps5-3Late SinemurianRaricostatum1.48-3.1025.2
 CH18-018Gibbirhynchia curviceps6-5Late SinemurianRaricostatum1.12-3.6427.8
 CH18-019Gibbirhynchia curviceps6-5Late SinemurianRaricostatum1.50-4.0930.0
 CH18-043Quadratirhynchia crassimedia6-5Late SinemurianRaricostatum0.97-2.8224.0
 CH18-045Quadratirhynchia crassimedia6-5Late SinemurianRaricostatum1.56-3.3826.6
 CH18-021Quadratirhynchia crassimedia6-3Late SinemurianRaricostatum1.55-3.2125.8
 CH18-052Gibbirhynchia cf. curviceps5-2Late SinemurianRaricostatum1.43-3.1125.3
 CH18-054Quadratirhynchia crassimedia5-1Late SinemurianRaricostatum1.13-3.9129.1
 CH18-055Quadratirhynchia crassimedia5-1Late SinemurianRaricostatum1.35-3.7528.4
 CH18-010Quadratirhynchia crassimedia6-1Late SinemurianRaricostatum1.49-3.3426.4
Luminescent, altered shells
 CH18-023Gryphaea tricarinataLate Sinemurian1.39-14.23(93.5)
 CH18-024Gryphaea tricarinataLate Sinemurian1.51-9.13(58.2)
 CH18-025Gryphaea tricarinataLate Sinemurian1.56-8.31(53.2)
Sediment and cement samples
 CH18-006SedSediment fill6-10Late ToarcianThouarsense – lower Levesquei0.33-8.42(53.9)
 CH18-022SedSediment fill6-2Late SinemurianRaricostatum2.02-4.23(30.7)
 CH18-038SedSediment fill5-3Late SinemurianRaricostatum2.37-2.85(24.1)
 CH18-056CemCement fill6-6Late SinemurianRaricostatum1.61-10.36(66.1)
  1. aTemperatures are calculated with the equation of Anderson and Arthur (1983) and a δ18O value of -1‰ VSMOW for seawater during shell formation (Shackleton and Kennett 1975)